How do you mean, exactly? Are you talking about copying individual events from within a bar? Insofar as tempo control, it is of course fairly trivial to change the bpm on any given bar.
Let's say there are 4 columns in a bar (which correspond to 4/4). I select Kick Drum icon and click it on the first column. I then select Tom Floor and click it on the first column. Finally I select hi hat and click it on the first column. The first column has a stack of 3 drum icons. Now, I change my mind. I want to this stack of 3 icons move to the second column. With the current release, we have to select hi hat and click on the first column to remove it and then click on the second column; select Tom Floor and click on the first column to remove it and then click on the second column and finally select Kick Drum and click on the first column to remove it and click on the second column. As you can see, it is a laborious process. A column copy and paste will save time. I may be missing...maybe this capability is already existent in Doggiebox? Billy IBM Software Tester--Dokimazo pas (translates to: test, examine, prove, or scrutinise all things) - 1 Thes 5:21